Księstwo may refer to:
*A Polish
duchy
A duchy, also called a dukedom, is a Middle Ages, medieval country, territory, fiefdom, fief, or domain ruled by a duke or duchess, a ruler hierarchically second to the king or Queen regnant, queen in Western European tradition.
There once exis ...
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Księstwo, Łódź Voivodeship (central Poland)
*
Księstwo, Masovian Voivodeship (east-central Poland)
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